How can get nth line from a file

1. time head -5 emp.lst tail -1
   It has taken time for execution is
   real 0m0.004s
   user 0m0.001s
   sys 0m0.001s
   or
2. awk 'NR==5' emp.lst
   It has taken time for execution is
   real 0m0.003s
   user 0m0.000s
   sys 0m0.002s
   or
3. sed -n '5p' emp.lst
   It has taken time for execution is
   real 0m0.001s
   user 0m0.000s
   sys 0m0.001s
   or
4. using some cute trick we can get this with cut command
   cut -d “
   “ -f 5 emp.lst
   # after -d press enter ,it means delimiter is newline
   It has taken time for execution is
   real 0m0.001s
   user 0m0.000s
   sys 0m0.001s
   
   Analysis: comparing above commands 'head' command taken maximum time
   because it pipes the output to tail command. piping consumes some
   time.
   Next “awk” command has taken greater time ,because 'awk' not only
   a command, it is a programing language too.